Synthesis and insecticidal evaluation of novel N'-tert-butyl-N'-substitutedbenzoyl-N-5-chloro-6-chromanecarbohydrazide derivatives |
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Authors: | Mao Chun-Hui Wang Kai-Liang Wang Zi-Wen Ou Xiao-Ming Huang Run-Qiu Bi Fu-Chun Wang Qing-Min |
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Institution: | State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China. |
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Abstract: | A series of novel N'-tert-butyl- N'-substitutedbenzoyl-N-5-chloro-6-chromanecarbohydrazide derivatives were synthesized, and their larvicidal activities against Oriental armyworm were evaluated. The results of bioassays indicated that most of these title compounds exhibit higher larvicidal activities than RH-5849, and several of them somewhat lower than the commercial insecticide tebufenozide. The larvicidal activities are strongly associated with the types and patterns of substitution on the benzene, and 3,5-dimethyl, 2-nitro-4-chloro and 3-methyl derivatives are most prominent in increasing activity. Toxicity assays indicated that these derivatives could induce a premature, abnormal, and lethal larval moult. |
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